Attachment Report

This document pretains to SES-MOD-INTR2019-01736 for Modification on a Satellite Earth Station filing.

IBFS_SESMODINTR201901736_1692560

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Alaska Public Telecommunications, Inc. ANCHORAGE, AK Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 May 22, 2019

TABLE OF CONTENTS 1. CONCLUSIONS ............................................................................................................................................ 3 2. SUMMARY OF RESULTS ............................................................................................................................ 4 3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5 4. EARTH STATION COORDINATION DATA .................................................................................................. 6 5. CERTIFICATION ......................................................................................................................................... 10 Frequency Coordination and Interference Analysis Report 05/22/2019 Page 2 of 10

1. CONCLUSIONS An interference study considering all existing, proposed and prior coordinated microwave facilities within the coordination contours of the proposed earth station demonstrates that this site will operate satisfactorily with the common carrier microwave environment. Operation will be restricted to the bandwidth shown in Section 4 of this report. Frequency Coordination and Interference Analysis Report 05/22/2019 Page 3 of 10

2. SUMMARY OF RESULTS The great circle interference cases identified during the interference study for this earth station were addressed in the previous coordination. Due to the minor nature of these changes, no response is required for this notice. Frequency Coordination and Interference Analysis Report 05/22/2019 Page 4 of 10

3. SUPPLEMENTAL SHOWING Pursuant to Part 25.203(c) of the FCC Rules and Regulations, the satellite earth station proposed in this application was coordinated by Comsearch using computer techniques and in accordance with Part 25 of the FCC Rules and Regulations. A minor modification for this earth station was sent to the below listed carriers with a letter dated 05/22/2019. Company ACS Long Distance License Sub, Inc. ACS Wireless License Sub, Inc. ACS of Anchorage License Sub, Inc. AT&T Mobility Spectrum LLC - AK Alascom Inc Alaska Pipeline Company Alaska Public Telecommunications, Inc. Alaska Railroad Corporation Chugach Electric Association, Inc. Enstar Natural Gas Company GCI Communications Corp. Homer Electric Association MATANUSKA KENAI INC MTA Communications, LLC Matanuska Telephone Association, Inc. Matanuska-Susitna, Borough of Norstar Pipeline Company State of Alaska United Utilities, Inc. Verizon Wireless (VAW) LLC - Alaska Frequency Coordination and Interference Analysis Report 05/22/2019 Page 5 of 10

4. EARTH STATION COORDINATION DATA This section presents the data pertinent to frequency coordination of the proposed earth station that was circulated to all carriers within its coordination contours. Frequency Coordination and Interference Analysis Report 05/22/2019 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 05/22/2019 Job Number: 190522COMSTC03 Administrative Information Call Sign E180008 Licensee Code KAKMTV Licensee Name Alaska Public Telecommunications, Inc. Site Information ANCHORAGE, AK Latitude (NAD 83) 61° 11' 24.8" N Longitude (NAD 83) 149° 48' 33.7" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 50.29 m / 165.0 ft Link Information Satellite Type Geostationary Mode TO - Transmit-Only Modulation Digital Satellite Arc 90° W to 177° West Longitude Azimuth Range 117.0° to 210.4° Corresponding Elevation Angles 5.4° / 17.1° Antenna Centerline (AGL) 11.74 m / 38.5 ft Antenna Information Transmit Manufacturer SSE Model SSE-45 Gain / Diameter 46.7 dBi / 4.5 m 3-dB / 15-dB Beamwidth 0.76° / 1.52° 100KG7W - 18M0G7W – 36M0G7W Max Available RF Power (dBW/4 kHz) -16.02 -16.02 -16.02 (dBW/MHz) 7.98 7.98 7.98 Maximum EIRP (dBW/4 kHz) 30.68 30.68 30.68 (dBW/MHz) 30.68 54.68 54.68 (dBW) 44.66 67.21 70.22 Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Frequency Information Transmit 6.1 GHz Emission / Frequency Range (MHz) 100KG7W - 18M0G7W / 6059.15 - 6078.45 Band Edges 100KG7W - 36M0G7W / 6108.45 - 6182.24 Band Edges 100KG7W - 36M0G7W / 6271.54 - 6330.49 Band Edges 100KG7W - 36M0G7W / 6360.49 - 6425.0 Band Edges Max Great Circle Coordination Distance 221.8 km / 137.8 mi Precipitation Scatter Contour Radius 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 05/22/2019 Page 7 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values ANCHORAGE, AK Licensee Name Alaska Public Telecommunications, Inc. Latitude (NAD 83) 61° 11' 24.8" N Longitude (NAD 83) 149° 48' 33.7" W Ground Elevation (AMSL) 50.29 m / 165.0 ft Antenna Centerline (AGL) 11.74 m / 38.5 ft Antenna Mode Transmit 6.1 GHz Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Max Available RF Power -16.0 (dBW/4 kHz) Transmit 6.1 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 0 0.00 116.89 -10.00 127.50 5 0.00 111.91 -10.00 127.50 10 0.00 106.94 -10.00 127.50 15 0.00 101.96 -10.00 127.50 20 0.00 96.98 -10.00 127.50 25 0.00 92.01 -10.00 127.50 30 0.00 87.03 -10.00 127.50 35 0.00 82.05 -10.00 127.50 40 0.58 77.06 -10.00 100.00 45 0.58 72.08 -10.00 100.00 50 0.80 67.09 -10.00 100.00 55 1.04 62.10 -10.00 100.00 60 1.09 57.12 -10.00 100.00 65 1.09 52.14 -10.00 100.00 70 1.09 47.16 -9.84 100.00 75 1.20 42.18 -8.63 100.00 80 1.20 37.21 -7.27 100.00 85 1.63 32.21 -5.70 100.00 90 2.01 27.21 -3.87 100.00 95 2.26 22.22 -1.67 100.00 100 3.32 17.13 1.15 100.00 105 3.34 12.18 4.86 100.00 110 2.20 7.69 9.85 109.19 115 3.68 2.62 21.53 221.80 120 2.96 3.45 18.56 190.89 125 2.09 6.28 12.05 151.27 130 1.92 8.38 8.92 118.55 135 2.03 10.09 6.90 102.61 140 1.94 11.86 5.14 100.00 145 1.67 13.65 3.62 101.28 150 1.40 15.28 2.39 104.69 155 1.25 16.62 1.49 105.80 160 1.02 17.84 0.72 109.51 165 0.81 18.83 0.13 116.68 170 0.69 19.53 -0.27 121.24 175 0.52 20.04 -0.55 128.13 180 0.38 20.30 -0.69 137.41 185 0.36 20.20 -0.63 139.18 Frequency Coordination and Interference Analysis Report 05/22/2019 Page 8 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values ANCHORAGE, AK Licensee Name Alaska Public Telecommunications, Inc. Latitude (NAD 83) 61° 11' 24.8" N Longitude (NAD 83) 149° 48' 33.7" W Ground Elevation (AMSL) 50.29 m / 165.0 ft Antenna Centerline (AGL) 11.74 m / 38.5 ft Antenna Mode Transmit 6.1 GHz Interference Objectives: Long Term -154.0 dBW/4 kHz 20% Short Term -131.0 dBW/4 kHz 0.0025% Max Available RF Power -16.0 (dBW/4 kHz) Transmit 6.1 GHz Horizon Antenna Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) 190 0.00 20.21 -0.64 154.27 195 0.00 19.64 -0.33 155.37 200 0.00 18.84 0.12 156.99 205 0.00 17.83 0.72 159.17 210 0.00 17.07 1.19 160.92 215 0.00 17.67 0.82 159.54 220 0.00 19.52 -0.26 155.60 225 0.00 22.33 -1.72 150.53 230 0.00 25.78 -3.28 145.38 235 0.00 29.65 -4.80 140.66 240 0.00 33.80 -6.22 136.49 245 0.00 38.12 -7.53 134.11 250 0.00 42.58 -8.73 130.89 255 0.00 47.12 -9.83 127.95 260 0.00 51.73 -10.00 127.50 265 0.00 56.39 -10.00 127.50 270 0.00 61.09 -10.00 127.50 275 0.00 65.81 -10.00 127.50 280 0.00 70.55 -10.00 127.50 285 0.00 75.31 -10.00 127.50 290 0.00 80.08 -10.00 127.50 295 0.00 84.86 -10.00 127.50 300 0.00 89.64 -10.00 127.50 305 0.00 94.42 -10.00 127.50 310 0.00 99.19 -10.00 127.50 315 0.00 103.96 -10.00 127.50 320 0.00 108.72 -10.00 127.50 325 0.00 113.47 -10.00 127.50 330 0.00 118.19 -10.00 127.50 335 0.00 122.90 -10.00 127.50 340 0.00 127.56 -10.00 127.50 345 0.00 131.79 -10.00 127.50 350 0.21 126.84 -10.00 126.56 355 0.00 121.86 -10.00 127.50 Frequency Coordination and Interference Analysis Report 05/22/2019 Page 9 of 10

5. CERTIFICATION I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION, THAT I AM FAMILIAR WITH PARTS 101 AND 25 OF THE FCC RULES AND REGULATIONS, THAT I HAVE EITHER PREPARED OR REVIEWED THE FREQUENCY COORDINATION DATA SUBMITTED WITH THIS APPLICATION, AND THAT IT IS COMPLETE AND CORRECT TO THE BEST OF MY KNOWLEDGE AND BELIEF. Timothy O. Crutcher Frequency Planner COMSEARCH 19700 Janelia Farm Boulevard Ashburn, VA 20147 DATED: May 22, 2019 Frequency Coordination and Interference Analysis Report 05/22/2019 Page 10 of 10


Document Created: 2019-05-22 11:03:05
Document Modified: 2019-05-22 11:03:05
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